The white paste extruded from the nipple is associated with inflammatory diseases of the breast tissue or nipple. Before that, we need to exclude the possibility of breast malignant tumors: 1, nipple inflammation, if the nipple area is infected with pathogenic bacteria leading to local inflammatory lesions, especially the nipple area of the sebaceous glands are infected with inflammation will be squeezed out of the white paste, the patient will be conscious of the pain in the nipple area, the nipple area can be seen when examining the nipple area is red, swollen. 2, the breast ducts are infected with inflammation, the milk duct infection inflammation, there are more inflammatory secretion in the duct, may be discharged through the nipple, resulting in the appearance of white paste in the nipple area. Inflammatory secretions may be discharged through the nipple, resulting in white paste in the nipple area.3. Breast cancer, the possibility is not very large, but it cannot be completely excluded, and it needs to be clearly diagnosed by ultrasonography, molybdenum target examination, secretion cytology examination, and so on.